Having watched his show, it's my humble opinion that he must have banged his head much harder and on repeated occasions early in life, during his development phase.
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("the river is the melody, the sky is the refrain")
I've always thought that Conan looks like Hermey, the misfit elf so what I think really happened here...is that Rudolph tripped Conan while he was running down the stairs
Conan O'Brien hits his head in a fall !
